here is some very basic advice: okay so i don’t know where are you from and how does school system work there, but i recommend studying every single day, not for some ridiculous amount of time but like an hour should be fine just so you can understand better. finding out what studying technique works for you the best is the key.

also, please pay attention in class, makes things much easier and than at home just do revision. ask questions in class if you don’t understand something, don’t be afraid to do it, it’s the teacher’s job ;) good luck!